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ENERGIX-Stort program energi

Fixation of nutrient elements in digestate

Tildelt: kr 3,8 mill.

Prosjektnummer:

203400

Prosjektperiode:

2010 - 2014

Midlene er mottatt fra:

Organisasjon:

Geografi:

Samarbeidsland:

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The proposed project is an interdisciplinary collaboration project between the bio-energy industries, the wastewater treatment industry, bio-energy technology industries, organic fertilizer industry and plant-, soil-, fertiliser-, chemistry- and technolog y researcher from the institute and university sector. The project contributes to fulfil the Norwegian political aim to utilise 30 % of the manure and organic wastes for biogas production, focusing on sustainable use of the digestate from large biogas pla nts in agricultural production. Recyling of plant nutrients in the digestate to agricultural production on large biogas plants is a major challenge because of large volumes with low dry matter content. To reduce the transport of the digestate, the dissol ved and suspended plant nutrients can be removed by introducing advanced efficient separation technology to separate the solid and liquid fractions of the digestate. The aim of the proposed project is to produce high quality organic fertilisers from diges tate by developing post treatment separation technology to distinguish between dissolved and suspended organic matter, developing post treatment technology to remove the dissolved plant nutrients ammonia and potassium, and to optimise the organic fertiliz er composition to obtain optimal plant response and high plant nutrient availability. The main challenges in the project is to use flocculants, a filtration technology and absorbents with a high nutrient removal efficiency and which are acceptable for bei ng used as fertiliser in agricultural production. The project is therefore a success if the separation technology concentrates more than 80 % of nitrogen, phosphorous and potassium (K) in a solid phase of digestate and is easily available for plant uptake and acceptable as fertilizers in agriculture, and if the nutrient concentration in the liquid phase of digestate is reduced to a level acceptable for re-use in biogas production.

Budsjettformål:

ENERGIX-Stort program energi